I seem to have the best luck finding arthropods on snow on days when there is fresh snow on the ground and temperatures 20 to30F (-5 to 0C). A few snow flurries in the air are OK, but if there's heavy snow falling, the spiders and insects are nowhere to be seen. I also found more creatures in the deep woods than out in the open. How about you? In your experience, what weather conditions make a good day for arthropod hunting on snow?